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SAFETY CONSIDERATIONS

Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating equipment. Untrained
personnel can perform basic maintenance functions such as clean-
ing and replacing air filters. All other operations must be per-
formed by trained service personnel. When working on heating
equipment, observe precautions in literature, on tags, and on labels
attached to or shipped with unit and other safety precautions that
may apply.

Follow all safety codes. In the United States, follow all safety
codes including the National Fuel Gas Code (NFGC) NFPA No.
54-1992/ANSI Z223.1-1992. In Canada, refer to the current
edition of the National Standard of Canada CAN/CGA-B149.1-
and .2-M91 Natural Gas and Propane Installation Codes (NSC-
NGPIC). Wear safety glasses and work gloves. Have fire extin-
guisher available during start-up and adjustment procedures and
service calls.

Recognize safety information. This is the safety-alert symbol

.

When you see this symbol on unit or in instructions and manuals,
be alert to potential for personal injury.

Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with safety-alert symbol. DANGER
identifies most serious hazards which will result in severe personal
injury or death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify unsafe
practices which would result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or operation.

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

CAUTION:

Electrostatic discharge can affect electronic

components. Take precautions during furnace installation
and servicing to protect the furnace electronic control.
Precautions will prevent electrostatic discharges from
personnel and hand tools which are held during the
procedure. These precautions will help to avoid exposing
the control to electrostatic discharge by putting the
furnace, the control, and the person at the same electro-
static potential.

1. Disconnect all power to the furnace. DO NOT TOUCH

THE CONTROL OR ANY WIRE CONNECTED TO THE
CONTROL PRIOR TO DISCHARGING YOUR BODY’S
ELECTROSTATIC CHARGE TO GROUND.

2. Firmly touch a clean, unpainted, metal surface of the

furnace chassis which is close to the control. Tools held in
a person’s hand during grounding will be satisfactorily
discharged.

3. After touching the chassis you may proceed to service the

control or connecting wires as long as you do nothing that
recharges your body with static electricity (for example; DO
NOT move or shuffle your feet, DO NOT touch un-
grounded objects, etc.).

4. If you touch ungrounded objects (recharge your body with

static electricity), firmly touch furnace again before touch-
ing control or wires.

Fig. 3—Clearances to Combustibles

A93060

320611-101 REV. G

*

1

1

0

3

0

1

0

0

3

0

MINIMUM CLEARANCE TO COMBUSTIBLE MATERIAL

This appliance is equipped only for altitudes 0 - 2,000 ft (0-610 m) for use with natural

gas and propane. A conversion kit, supplied by the manufacturer, shall be used to convert to
the alternate fuel or elevation.

This direct-vent, forced-air furnace is for indoor installation in a building constructed

on site or in a manufactured (mobile) home when using factory authorized kit, see
rating plate. For installation in alcove or closet at minimum clearances from combustible
material as shown below.

This appliance requires a special venting system. Refer to the installation instructions for

parts list and method of installation. This furnace is for use with schedule-40 PVC, PVC-DWV,
or ABS-DWV pipe, and must not be vented in common with other gas-fired appliances.
Construction through which vent/air intake pipes may be installed is maximum 24 inches
(600 mm), minimum 3/4 inches (19 mm) thickness (including roofing materials).

VENT

FRONT

BACK

SIDES

0

3

0

0

1

BOTTOM

0

#

0

*

#

For Installation on combustible floors only when installed on special base

No. KGASB0201ALL.

Clearance shown is for air inlet and air outlet end.
Horizontal position: Line contact is permissible only between lines formed by intersections

of top and two sides of furnace jacket, and building joists, studs, or framing.

120,000 BTU Input Furnaces require 1 inch bottom clearance to combustible materials.
Minimum front clearance for service is 30 inches. (762mm).

Ø

UPFLOW

DOWNFLOW

HORIZONTAL

INCHES

Ø

Ø

Ø

TOP

—3—

Summary of Contents for 355MAV C Series

Page 1: ...Concentric Vent and Combustion Air Termination Kit Installation 25 27 Multiventing and Vent Terminations 27 29 CONDENSATE DRAIN 29 General 29 Application 29 Condensate Drain Protection 29 SEQUENCE OF...

Page 2: ...TLET 26 15 16 28 1 2 22 5 16 19 13 16 5 8 5 16 1 39 7 8 22 1 4 TYP 11 16 7 16 24 3 16 BOTTOM INLET 18 1 4 22 11 16 2 IN COMBUSTION AIR CONN 1 2 IN DIA GAS CONN 7 8 IN DIA POWER CONN 1 2 IN DIA THERMOS...

Page 3: ...ro static potential 1 Disconnect all power to the furnace DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY S ELECTROSTATIC CHARGE TO GROUND 2 Firmly touch a...

Page 4: ...and all authorities having jurisdiction These instructions cover minimum requirements for a safe instal lation and conform to existing national standards and safety codes In some instances these inst...

Page 5: ...ing tabs inward and rotating trap 3 Remove casing hole filler cap from casing hole See Fig 2 or 6 4 Install casing hole filler cap into blower shelf hole where trap was removed 5 Install condensate tr...

Page 6: ...roper connections UPPER INDUCER HOUSING DRAIN CONNECTION Attached to the UPPER unused inducer housing drain connection is a cap and clamp This cap is used to prevent condensate leakage in this applica...

Page 7: ...ector box drain tube blue and white striped label which was pre viously plugged b Connect larger diameter drain tube factory supplied in loose parts bag to drain tube coupling extending collector box...

Page 8: ...arts bag to extend collector box pressure tube green label which was previously connected to condensate trap relief port connection 3 Connect collector box pressure tube green label to pres sure switc...

Page 9: ...The LOWER collector box pressure tube pink label is factory connected to the pressure switch and should not require any modification NOTE See Fig 9 or tube routing label on main furnace door to check...

Page 10: ...ig 11 or tube routing label on main furnace door to check for proper connections Relocate tubes as described below 1 Disconnect collector box pressure tube pink label attached to pressure switch 2 Use...

Page 11: ...alers and or new carpets are being installed make sure all combustion and circulating air requirements are followed If operation of furnace is required during construction use clean outside air for co...

Page 12: ...perated they must be equipped with a means to prevent operation of either unit unless damper is in full heat or full cool position IV HAZARDOUS LOCATIONS NOTE These furnaces are designed for a minimum...

Page 13: ...ischarge duct flanges when they interfere with mating flanges on coil on downflow subbase To remove furnace perforated discharge duct flange use wide duct pliers or duct flange tool to bend flange bac...

Page 14: ...ttom inlet is used VI BOTTOM CLOSURE PANEL These furnaces are shipped with bottom enclosure panel installed in bottom return air opening This panel MUST be in place when side return air is used To rem...

Page 15: ...bustible material 2 The entire length of furnace must be supported when furnace is used in horizontal position to ensure proper drainage A PREFERRED ROD LOCATION B ALTERNATE ROD LOCATION DRAIN 5 3 4 3...

Page 16: ...nection MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual shutoff valve NOTE The gas valve inlet press tap connection is suitable to use as test gage...

Page 17: ...STAT TERMINALS FIELD SUPPLIED FUSED DISCONNECT CONDENSING UNIT R W2 W C R G Y GND GND GND GND FIELD 24 VOLT WIRING FIELD 115 208 230 460 VOLT WIRING FACTORY 24 VOLT WIRING FACTORY 115 208 230 460 VOLT...

Page 18: ...OR PL3 5 CIRCUIT BLOWER MTR CONNECTOR PL4 2 CIRCUIT HSI CONNECTOR PL5 6 CIRCUIT MODEL PLUG PL6 3 CIRCUIT COMM CONNECTOR PL7 12 CIRCUIT INDUCER MTR CONNECTOR PL9 2 CIRCUIT HSI CONNECTOR PL10 9 CIRCUIT...

Page 19: ...stripped end into factory supplied white leads s butt connector and crimp to secure NOTE If desired cut butt connectors off factory leads and strip insulation approximately 1 4 in and use field suppli...

Page 20: ...I COMBUSTION AIR AND VENT PIPING A General Combustion air and vent pipe fittings must conform to American National Standards Institute ANSI standards and American Society for Testing and Materials AST...

Page 21: ...y in well ventilated areas Avoid breathing in vapor or allowing contact with skin or eyes Failure to follow this warning could result in fire property damage personal injury or death TABLE 4 COMBUSTIO...

Page 22: ...20 ft with 3 elbows but only 10 ft with 5 elbows Therefore 2 in diameter pipe must be used for both vent and combustion air pipes since larger required diameter must always be used for both pipes If...

Page 23: ...In Concentric 1 1 2 42 37 32 27 22 17 2 70 70 70 70 70 70 042060 2 Pipe or 2 In Concentric 1 1 2 42 37 32 27 22 17 2 70 70 70 70 70 70 042080 060080 2 Pipe or 2 In Concentric 1 1 2 25 20 15 10 5 NA 2...

Page 24: ...6 65 63 62 60 59 042060 2 Pipe or 2 In Concentric 1 1 2 32 27 22 17 12 7 2 66 65 63 62 60 59 042080 060080 2 Pipe or 2 In Concentric 1 1 2 18 13 8 NA NA NA 2 66 65 63 62 57 52 060100 2 Pipe or 2 In Co...

Page 25: ...Apply second coat 9 While cement is still wet twist pipe into socket with 1 4 turn Be sure pipe is fully inserted into fitting socket 10 Wipe excess cement from joint A continuous bead of cement will...

Page 26: ...AIN 12 IN CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE WHICHEVER IS GREATER 90 VENT 12 IN SEPARATION BETWEEN BOTTOM OF COMBUSTION AIR AND BOTTOM OF VENT BRACKET COUPLING 12 MINIMUM OVERHANG...

Page 27: ...vent vapors will not damage plants shrubs or air conditioning equip ment c Termination kit should be positioned so it will not be affected by wind eddy such as inside building corners or accumulation...

Page 28: ...m Separation A93056 COMBUSTION AIR VENT VENT A Fig 40 Sidewall Termination of More Than 12 in Dimension A is Touching or 2 In Maximum Separation A85183 VENT A COMBUSTION AIR COMBUSTION AIR Fig 38 Conc...

Page 29: ...pment s drain See Fig 41 for example of possible field drain attachment using 1 2 in CPVC or PVC tee for vent and A C or humidifier drain connection Outdoor draining of the furnace is permissible if a...

Page 30: ...holds gas valve open and begins blower on delay period NOTE Ignition sequence repeats 3 additional times before a lockout occurs Lockout automatically resets after 3 hr or can be manually reset by tu...

Page 31: ...r operates in continuous fan speed and indoor coil freeze up may occur 3 Electronic Air Cleaner The EAC 1 terminal is energized whenever blower operates 4 Cooling unit The cooling unit stops when ther...

Page 32: ...is closed red microprocessor LED briefly comes on Then green LED comes on for 1 sec followed by 1 sec where both green and yellow LEDs are on During this time the microprocessor is checking itself 2...

Page 33: ...ements Position these setup switches for the appropriate requirement 1 Remove main furnace door and blower access panel 2 Locate setup switches on the control center See Fig 25 3 See Table 9 for setup...

Page 34: ...c gravity for local gas supply c Verify the furnace model Table 11 can only be used for model 355MAV Furnaces d Find natural gas heat value and specific gravity in Table 11 e Follow heat value line an...

Page 35: ...furnace locked in low heat operation c Turn low heat adjusting screw 5 64 hex Allen wrench counterclockwise out to decrease input rate or clock wise in to increase rate When adjusting input rate DO N...

Page 36: ...as started and furnace is operating in low heat TABLE 11 MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT RATE Tabulated Data Based on Altitude Up to 2000 ft and 20 000 Btuh High Heat...

Page 37: ...g properly fault code 42 will flash on the control center approximately 10 sec after the thermostat switch is closed If either fault code 31 or 32 is TABLE 12 GAS RATE CU FT HR SECONDS FOR 1 REVOLUTIO...

Page 38: ...ay tools and instruments Clean up debris 2 Verify manual reset switch has continuity 3 Verify that blower and control access doors are properly installed 4 Cycle test furnace with room thermostat 5 Ch...

Page 39: ...e Sloped To Furnace Pipe Insulation ________ Over Ceilings ________ Low Ambient Exposed Pipes Condensate Drain ________ Unit Level or Pitched Forward ________ Internal Tubing Connections Free of Kinks...

Page 40: ...sing popular video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that...

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